Frequencies for first 10,000 rows of drug2cl2 variable in nhamcsed2002 dataset :

   drug2cl2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,341       93.41       93.41
       0120 |         11        0.11       93.52
       0502 |          6        0.06       93.58
       0506 |          1        0.01       93.59
       0507 |          6        0.06       93.65
       0508 |          1        0.01       93.66
       0512 |          5        0.05       93.71
       0513 |          3        0.03       93.74
       0875 |          4        0.04       93.78
       0877 |          1        0.01       93.79
       0878 |          6        0.06       93.85
       0913 |          2        0.02       93.87
       1040 |          1        0.01       93.88
       1265 |          9        0.09       93.97
       1275 |         23        0.23       94.20
       1373 |         21        0.21       94.41
       1480 |          1        0.01       94.42
       1567 |          8        0.08       94.50
       1568 |          4        0.04       94.54
       1569 |         17        0.17       94.71
       1671 |        108        1.08       95.79
       1721 |         28        0.28       96.07
       1722 |          4        0.04       96.11
       1723 |          1        0.01       96.12
       1724 |         50        0.50       96.62
       1727 |         11        0.11       96.73
       1728 |        241        2.41       99.14
       1941 |          1        0.01       99.15
       1943 |         21        0.21       99.36
       1944 |          6        0.06       99.42
       1945 |          2        0.02       99.44
       2095 |         56        0.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016